Abstract
The EDTA (calcium disodium edetate) lead mobilization test revealed lead as the probable cause of renal disease in industrial lead workers and in patients with gout or essential hypertension. The data reviewed here demonstrate persistence of lead nephropathy in the contemporary scene despite the introduction of modern industrial and environmental exposure standards. Renal function and biopsy studies showed that lead nephropathy is a chronic tubulointerstitial renal disease with modest proteinuria which frequently presents with hyperuricemia, gout and hypertension. Only evaluation of body lead stores by either the EDTA lead mobilization test or by x-ray fluorescence is helpful in diagnosing lead nephropathy. While chelation therapy is safe and helpful in reversing early lead nephropathy, the best treatment is prevention. These studies further raise the possibility that chronic environmental lead poisoning and associated renal disease and hypertension may be a more widespread problem than suspected. Assessment of the true extent of chronic lead poisoning requires large scale epidemiological studies.
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